Start up DrumJam on both devices, make sure they are both on the same wifi network. Choose one to be the master, on that on go to Preferences->MIDI Setup, and turn on the Clock Output on Network Session under Output Connections. Down at the bottom under Remote Hosts you should see your other device listed by name, press that item to connect to it (you should see a checkmark afterwards). Now on the other device, go to the MIDI Setup and turn on Clock Input on the Network Session entry under Input Connections. That's it! When you start/stop and change tempo on the master device, the other should follow. Sometimes things won't sync up right after you change the tempo, usually stopping and starting will lock it in.

Love the app, love the way the samples on the pads are layered by velocity. It would be great to have round-robin samples for each velocity layer to get a bit more variation when rapidly triggering the same pad at the same velocity level.